The current version of Fring's VoIP calling and chat app for iPhone supports video calls in a fashion--you can see a buddy's streaming Webcam, but they couldn't see you (review). As a result, conversations felt lopsided for those on the other end of the iPhone.
Fring is now working on an update that will use the iPhone's camera to broadcast video of yourself to others. Since there's no front-facing camera on the iPhone, we can foresee needing to set up a shot before docking the iPhone on a long call. Also, pointing the back of the phone at yourself means you're not actually looking at your caller. We'd like to order up a Fring-friendly Webcam accessory, please.